CN1221533A

CN1221533A - Access network over shared medium

Info

Publication number: CN1221533A
Application number: CN97195228A
Authority: CN
Inventors: I·特拜; A·汉森
Original assignee: Telefonaktiebolaget LM Ericsson AB
Current assignee: Telefonaktiebolaget LM Ericsson AB
Priority date: 1996-06-04
Filing date: 1997-06-03
Publication date: 1999-06-30
Anticipated expiration: 2017-06-03
Also published as: CN1221534A; DE69736516T2; CN1221530A; KR20000015877A; EP0898838A1; ATE336857T1; US6515996B1; CA2257505C; AU3198697A; CN1201536C; CA2253789C; DE69732410D1; WO1997047119A1; EP0898833A1; JP2000511725A; US20020118676A1; EP0898837A2; CA2253789A1; KR20000015957A; ATE288655T1

Abstract

This invention relates to a network terminal (28) and an IP access node (24) in the access network. The network terminal gives instant access to a multitude of communication services such as telephony, video, data, multimedia as well as services provided by Internet. In the access network, IP is used as an internal multiplexing and transport technique. The speed at which data is transported on the access line is limited by the used modem technique; not by the restrictions posed by the general public switched telephone network. Several terminals may be connected to one and the same access line.

Description

The Access Network of framework on dedicated medium

TECHNICAL FIELD OF THE INVENTION:

The present invention relates to a network terminal and an IP-based access network.Network node provides multiple communication service, as phone, and video, data, multimedia access immediately also comprises simultaneously the business that the Internet provides.In Access Network, IP is used as multiplexed and transmission technology.What the transmission speed of data on line attachment was subjected to is the restriction of employed transmission technology; Rather than the restriction of common common exchanging telephone network PSTN.

Correlation technique:

What traditional access to PSTN was used is by the copper networks that circuit constituted of each user with two copper cash that separate, and these two copper cash are called as tie-in line or subscribers feeder.Tie-in line is supported the 3.1KHZ phone, and local office or in remote switch group termination.As physical medium, this a pair of copper cash can be supported much higher bandwidth, but traditional local office can only be supported the business of the stream of 64Kb/S or its multiple.

ISDN (integrated services digital network) has used the copper cash of same type, but uses DSL (Digital Subscriber Line) modulation technique, and it can provide 144kb/s (2B+D).But ISDN needs new Networking Solutions ﹠ provisioned fully.

Traditional method from subscriber household access Internet is to use the modulator-demodulator combination that is dial-up connection to an Internet server.Connection is based upon among the PSTN, and information is to exchange by the form that connects with IP bag (using the bag of IP assembly).At the user side of tie-in line, a phone is being connected a modulator-demodulator with a PC (personal computer).This modulator-demodulator is used to provide the transmission of numerical data.Because the data that the restriction of PSTN bit rate, modulator-demodulator send and receive are limited to about 30Kb/s.

The method of this known access Internet is slowly, and it need spend 30 seconds time to connect.Connect in case after setting up, because the burst characteristic of IP operation amount, the utilization of its bandwidth is very poor usually.When transferring large number of data, during especially such as the graphical information of the WWW page, because the finite bandwidth that modulator-demodulator connects to the highest 64kb/s data that modulator-demodulator provided, speed is also very slow.Furtherly, after having set up connection, just no longer can receive incoming call, can not send output again and call out.

From the angle of network, the method that more than inserts the Internet has serious problem.The planning of PSTN is that some feature of communication flows is supposed, has promptly supposed the mean value of the flow on user/tie-in line and the mean value of each call duration.The PSTN net is an on-line file, and the number of the outer out-trunk of local office can be 1/4th of user/tie-in line number.The Internet access of being undertaken by dialing modem then has diverse discharge model.For example its call duration is more much longer than the average time of common telephone call, is very frequent if insert by the Internet of PSTN, just need plan again switched telephone network.

The user who has the ISDN business can insert the Internet by one or two B channel.If a B channel is used for the Internet and inserts, the user can also answer Inbound Calls by another B channel so.Yet, this known cut-in method, the same with the method for dialing modem, the network planning there is same negative effect.

In the copper wire access technical field development is rapidly arranged at present.Consult list of references [1].The technology of a lot of different modulator-demodulators is developed, as VDSL (very bit rate Digital Subscriber Line) can the copper cash that reaches hundreds of rice on all provide the speed of 20Mb/s at twocouese.ADSL (ADSL (Asymmetric Digital Subscriber Line)) can provide the descending of 1.5-9Mb/s and the uplink of 16-640Kb/s at least according to the right length of copper cash.Yet these technology are all supposed will provide PSTN access with the same in the past, should use when being used for data communication than PSTN and insert wideer bandwidth.

The latest development of PSTN (ISDN) Access Network is included in standard interface V5.1 and the V5.2 between local office and the Access Network.These standards allow to introduce the access node that links to each other with local office.

Access node also can be connected with PSTN by digital PABX (PABX) interface, and is connected with ISDN by PRI (basic rate interface).V5 interface, PRI and PABX interface provide the bearer service of single or multiple 64Kb/s.

A previously known technology allows to carry out simultaneously Internet access and phone access on same telephone wire, its requires to use DSVD (digitlization of carrying out voice-and-data on single line is transmitted simultaneously) modulator-demodulator.

One is used for carrying out simultaneously that the Internet is inserted and the new technology of phone access has comprised a phone multiplier on same telephone wire, this is described in Fig. 1 and the list of references [2] below.

The phone multiplier can make the user who is connected with the analog electrical phone network insert an IP-based communication service, still can answer Inbound Calls when interconnection is surfed the web simultaneously and get phone.

Phone multiplier 1 links to each other with Internet 3 with PSTN2 in Fig. 1.At user side, modulator-demodulator 4 links to each other with PSTN2, standard analog telephones 5 and PC6.The phone multiplier comprises a modulator-demodulator combination 7, and it links to each other with PSTN2, Internet 3 and telephony server 9.

When a user A inserted the Internet by the modulator-demodulator combination 7 that links to each other with the PSTN dial-up connection, phone 5 can not use.On his/her PC, the user can utilize the connection of IP and multiplexing characteristics and other PSTN user to communicate.The line of dial-up can carry the multiplex stream of IP bag, comprising: (a) Internet online and (b) call.The IP bag that carries voice is received/sends to PSTN by telephony server 9.The phone control signal exchanges between the telephony application 10 that moves on telephony server 9 and the PC.If PC has audio function, this is with comprising that the wear-type receiver-transmitter of earphone and microphone represents, user A can finish and other ISDN or PSTN user between language talk.The user can have a new soft phone on PC6

Another is used for carrying out simultaneously the new technology that the Internet is inserted and phone inserts and has adopted above-mentioned phone multiplication principle on same telephone wire, but has replenished the IP modulator-demodulator that has adopted explanation in Fig. 2 and the list of references [3] at user side.The IP function that is provided by PC6 shown in Fig. 1 is integrated in the modulator-demodulator 12, and therefore this modulator-demodulator is called as the IP modulator-demodulator.

This structure makes when an Internet user carries out the Internet online by the PC that links to each other with the IP modulator-demodulator, might use the telephony application on standard analog telephones or the PC to carry out dial-up connection simultaneously.

Similar among structure among Fig. 2 and Fig. 1.Phone multiplier 1 links to each other with the Internet with PSTN, it comprise with Fig. 1 in identical unit.

Can transmit the IP bag that has comprised the information relevant by article one IP link 13 between IP modulator-demodulator and the Internet 3 with the Internet online.The part of this link comprises a subscribers feeder 14 that is connected between IP modulator-demodulator and the PSTN.On the second IP link 15, carrying IP digitized, the voice that compressed and wrapping between telephony server and the modulator-demodulator combination and transmit back and forth.Telephony server is set up a kind of dynamic relationship between the telephone number of the IP address of IP modulator-demodulator and user A.The incoming call of user A uses the call forward business and is redirected to telephony server in PSTN.

This structure will allow user A to use common call transceiver call, carry out the online of Internet simultaneously on personal computer." soft phone " in a kind of similar list of references [2] also is provided here.Because modulator-demodulator has the IP function, it may be by home network and other devices communicating, for example kilowatt-hour meter and similar equipment.

IP modulator-demodulator shown in Fig. 3 comprises a subscriber line interface 16, one or

more telephony interface

17,18, at least one PC interface 19 and an optional LAN interface 20.Also have an IP reuse/demodulation multiplexer 21 and controller 22 in addition.An optional application program 23 may operate in the IP modulator-demodulator, is used to inquire about the email queries device of E-mail address such as user A.IP reuse/demodulation multiplexer is routed to the IP bag their destination from subscriber line interface: PC, phone or LAN.Controller provides the control to the every function of IP modulator-demodulator.

List of references [2] and [3] all provide the phone access, and the IP traffic can be superimposed in the phone access simultaneously.

Have many problems to relate to the access on the traditional copper tie-in line of black phone and the Internet:

Phone multiplier and DSVD modulator-demodulator all can not solve the problem of the poor efficiency when using switch type to be connected to insert as the Internet.Can not solve the problem of many long-time Internet online PSTN network congestions that bring that continue in the connection of exchange.

On the simulation tie-in line, the bandwidth of 64kb/s can not be handled with traditional cut-in method.V5 interface between local office and Access Network and PABX/PRI interface can only be handled the channel of 64kb/s.Available bandwidth is not made good use of, because do not use the multiplexing capacity of IP.

Phone multiplier structure and DSVD modulator-demodulator require on tie-in line voice to be compressed, and this can introduce time delay.Fax support is provided in telephony server, and phone multiplier structure can be used to send Fax Messaging.

Brief summary of the invention

The objective of the invention is to solve the poor efficiency problem of the available bandwidth of the non-centralized IP traffic among the PSTN, and needn't change PSTN so that it adapts to the characteristic of Internet access communications amount.

Another object of the present invention is that feasible being connected on the tie-in line more than a terminal (such as phone and personal computer) becomes possibility, and supports several sessions of communication simultaneously.

Another object of the present invention is to allow a user to be linked into the several different PSTN network of being runed by the heterogeneous networks network operator.

Another object of the present invention is to allow a user to be linked into the several different IP network of being runed by the heterogeneous networks network operator.

According to the present invention, proposed the IP access service and should not use the PSTN of switch type to connect.

According to the present invention, IP is used as host-host protocol in Access Network.

According to the present invention, on IP network, provide to the access of telephone network with to the access of IP network.Access to IP network is " always connecting ".

Compare with phone multiplier structure, the modulator-demodulator combination need not be provided.On the contrary, every subscribers feeder is all by xDSL modulator-demodulator termination.Further, the bandwidth of subscribers feeder is no longer exchanged the restriction of connection/dial-up connection bandwidth.On the contrary, its tie-in line agreement (such as xDSL) can be used for making the tie-in line digitlization, and wherein xDSL is DSL, HDSL, SDSL, VDSL or any digital subscriber line protocols that is provided the future of bit rate.Voice no longer need compression.Support the modulator-demodulator of xDSL agreement to be used on the tie-in line.In Access Network, no longer need the sound level modulator-demodulator.

The accompanying drawing summary:

Fig. 1 is the block diagram of phone multiplier structure,

Fig. 2 is the block diagram of IP modulator-demodulator in the phone multiplier structure,

Fig. 3 is the block diagram of an IP modulator-demodulator,

Fig. 4 is the IP-based access node in a remote switch group structure,

Fig. 5 is the block diagram of similar Fig. 4,

Fig. 6 is the block diagram of similar Fig. 4, and it allows to be linked into some Internets, in-house network and PSTN network operator,

Fig. 7 is the block diagram based on the IP access node that is connected in the cohort structure of the remote switch on the IP reuse device,

Fig. 8 is an IP-based access node in the PBX structure,

Fig. 9 is according to network terminal block diagram of the present invention,

Figure 10 is the different protocol stack that is used in the voice telephone traffic amount in the network terminal and the access node, and

Figure 11 is the different protocol stack that is used for IP operation amount between PC and Internet.

The detailed description of embodiment:

In Fig. 4, IP access node 24 links to each other with Internet 3 on interface 25, links to each other with PSTN/ISDN 2 on interface 26, links to each other with user or tie-in line 14 on tie-in line interface 27.As term used herein, interface this ask language to refer to a unit or unit group, and it handles an agreement or protocol stack.User A is connected his/her phone on the network terminal (NT) 28 at first telephone line interface, 29 places.User A has a personal computer (PC) to be connected on the network terminal at PC interface 30 places.

PC also can be connected on the network terminal by the local lan network that below will describe.

NT also has a subscriber line interface 31.The IP access node has comprised an IP access server 32, ip router 8 and telephony server 9.Tie-in line interface 27 belongs to the IP access server.The IP access server comprises one group of independently xDSL modulator-demodulator.The IP access server also has a telephony server interface 33.The IP bag that has comprised phone information is routed to this telephony server by this interface or is routed out from this

telephony server.Unit

32,9,8 with 28 intercommunications mutually, their use the IP bag belong to an Access Network internal address space.

The PSTN interface can be a V5.2 interface.

The network terminal is supported IP, and be similar to the IP modulator-demodulator in above described and [3] on function, different is that it is without voice level modulator-demodulator, and be to use the modulator-demodulator of the Business Stream that can support bit rate, arbitrary xDSL agreement for example referred to above.

The IP that will have one " always connecting " between the network terminal of user A and IP access server connects.This has just eliminated problem mentioned above, i.e. the problem of the long-term work that the last dialing of PSTN Internet is inserted and the poor efficiency of available bandwidth.The Internet access service stream will not enter PSTN, and making PSTN go up congested danger will not exist.In access network, the multiplexing capacity of IP agreement can be employed, and IP operation can be concentrated easily.

Under the situation with the network terminal and IP-based access node, the bit stream business on the subscribers feeder is not subjected to the restriction of PSTN.On the contrary, the length of employed transmission technology and subscribers feeder becomes the restrictive condition of accessible bit rate.Length is short more, and the bit rate that reaches is high more.

With IP as on the basis of the multiplex technique on the subscribers feeder, voice-and-data can transmit on subscribers feeder with the form of IP bag.Because available bandwidth ratio transmits the voice of call and wants much wide, voice do not need compression.

Only shown among Fig. 4 that a network terminal links to each other with the IP access server.Under actual conditions, the different network terminal relevant with many different users is connected to the IP access server.The IP access server has the tie-in line interface with the network terminal equal number that is connected in this case.This represents with the interface symbol that does not have label in the IP access server.

Addressing mechanism

See below that Fig. 7 will set forth, user A can insert several Internet network operators' network, Internet-OP1, Internet-OP2 and several PSTN network operators' network, PSTN-0P1, PSTN-OP2.Further, the network terminal of user A can be provided with second telephony interface 34 and extra 35, one local LAN of terminal device interface or second PC can be connected on this equipment interface 35.

The addressing method of distinct device and interface will be set forth with reference to figure 7 hereinafter.

Map addresses and route

Map addresses plays an important role in the present invention.This structure with every kind of business network of several different business suppliers can provide several address spaces, therefore can not use by home address.

The port of an interface and interface back can be indicated in an IP address.A common port is specified a kind of application.

The network terminal 28 has an implicit IP address, and (inside refers within Access Network, be the IP address not beyond the accessed network known to), further, for NT28 has defined several ports, each port is endowed a kind of application (residing among the NT), and they can visit by IP.For example, the phone application 52 in the network terminal shown in Figure 10, it comes addressing by the IP address of NT28 and unique port numbers.Support the different access of individual equipment (for example a serial ports or an analog telephone insert) to be counted as various application, so come addressing with port numbers.The equipment that is connected with LAN has their implicit IP address.If they want to communicate by letter such as Internet 3 through an external IP network, then they also need an outside ip address simultaneously.

Be associated with the subscriber-related telephone number of telephone service and one or morely have on the equipment of handling telephone capability (being connected to NT28).These equipment can be the analog or digital telephone sets.

In access network, for example under situation about having, as long as can be just enough to NT28 and phone application 52 addressing for the incoming call of this destination.This is by external call number (or other representation of number) is mapped on the home address of NT28, and on the port numbers of phone application 52.By loaded information on the application protocol, phone application 52 is just known the destination of calling.Phone application 52 has the telephony interface information relevant with the destination.

Phone application 52 among the NT28 is communicated by letter with the phone application 67 in the telephony server 9, and telephony server 9 has similar address.The IP address of telephony server 9 comprises a port address.Phone application 67 in the telephony server 9 can be successively to the corresponding interface addressing of required telephone network, 45 or 46 among such telephone network such as Fig. 7.

With external IP network (as the Internet) when communicating by letter, can use a kind of passage technology.To this several processing methods can be arranged.Referring to Figure 11.We suppose that passage 84 extends between PC6 and ip router 8, this router is handled the interface of external network 42,43 among Fig. 7.All process passages are delivered to the bag of ip router 8 will go to same external IP network, and for example the external IP network 43.PC 6 has an implicit IP address and an outside ip address.

In this case, one arrives ip router 8 and one on the PC 6 IP bag of using addressing (by an outside ip address with portal number) is handled with the method for hereinafter setting forth from the external IP network.Outside ip address is mapped to the implicit IP address of PC 6, and this address comprises a portal number, and an application of this channel protocol is handled in indication.This IP bag then is placed in the new IP package with implicit IP address, and is routed to purpose PC 6 through Access Network.

An IP bag that is sent to external address from PC 6 is carried out channelizing by identical method with implicit IP address to handle the application of a treatment channel agreement of this home address sensing.Channel recognition goes out this IP bag will point to for which interface.

Before NT28 was used to Business Processing, it must be carried out configuration earlier, so that for example can support map addresses.NT is provided to the home address of router 8 and/or telephony server 9, and the data relevant with the access possibility of the use of being asked, i.e. NT configuration.This configuration possibility will be discussed hereinafter.After NT5 is installed in the Access Network, must notice ip router 8 and telephony server 9.Therefore, telephony server 9 will be apprised of about its existence and relevant implicit IP address, the port numbers and the telephone number corresponding number (for example port numbers in the telephony server) digital or of equal value of NT28 phone application.Similarly, 8 of ip routers will be apprised of port address and the corresponding one or more outside ip address with the IP application of implicit IP address and NT28.Under the situation of using channel protocol, the home address of PC must be known.NT28 must dispose in view of the above.For example, a telephone number is relevant with the number of interface.

Arrive the incoming traffic of NT

Referring to Fig. 4.Input call to destination A is received by the PSTN interface of telephony server.Telephony server carries out digitlization to calling, and the voice after the digitlization are broken into bag, and a call identification is provided, and at last it is squeezed into the IP bag, provides the implicit IP address of NT and the port numbers of phone application 52 in the IP bag, as shown in figure 10.The IP bag is sent to the IP access server, and they are forwarded to NT.NT checks the destination address of IP bag, and phone application 52 is forwarded to telephony interface with the IP bag simultaneously, is unpacked at interface IP bag, and carries out the D/A conversion.Produce analoging sound signal, and send to telephone set.

With reference to Figure 10, hereinafter will set forth the control signal relevant with calling.

If have the business of input IP to arrive PC or any other is connected in the equipment of application of the network terminal or the network terminal, the IP bag that comes from the Internet will arrive ip router, router is checked outside ip address, checks its mapping table and identifies the IP bag and should transmit the home address that goes to.Then, ip router sends to purpose NT by the IP access server with the IP bag.NT then checks external IP and IP bag is forwarded to their corresponding interface, it at this moment one be the PC interface.

If the input call that comes from PSTN is arranged, the input IP bag that comes from the Internet is arranged simultaneously, the IP that comes from two sources wraps in the IP access server and is re-used, and they are sent to the network terminal from access server through subscribers feeder.The network terminal wraps demultiplexing with IP, and the bag of the IP behind the demultiplexing is sent to their corresponding target ground.

Outgoing traffic from NT

With reference to Figure 11, hereinafter will set forth the control signal of output phone traffic.

With reference to figure 4.The voice process A/D among NT that comes from phone at outbound course changes.NT packs digitized voice, and a call identification is provided, and its IP that packs into is wrapped, and the home address of telephony server is provided to the IP bag.This IP bag is received by the IP access server, and this their destination of server inspection also sends it to telephony server, and the IP bag is unpacked there, and transforms through D/A.The result who transforms is an analoging sound signal, and they are sent to PSTN through suitable channel.

A phone can have several external addresss.

Wrap in when relating to call from the IP of NT output and to carry out mark, and when relating to the Internet online, IP bag quilt is carried out mark with the home address of ip router with the home address of telephony server and its phone application.The IP access server will be checked the home address of IP bag, and in view of the above they be carried out route.If they are routed to ip router, ip router will be checked for example gap marker, and forward it to their destination.If they are connected to telephony server, telephony server will be checked their call identification, and unpack with D/A conversion after, speech connection is connected to corresponding PSTN.

In telephone conversation, the network terminal is used the Internet and is surfed the Net.As hereinafter will explaining, the network terminal has an IP reuse device/demodulation multiplexer with routing capabilities.This equipment will be multiplexed into same to the PPP connection of IP server from different application and/or terminal information, and with the IP demultiplexing of receiving, again the IP bag will be forwarded to separately destination.The network terminal is forwarded to the application that operates on the PC with the IP bag of input from the Internet, it does not show in the drawings, and the IP bag that will contain call voice information is forwarded to phone application.

User A can use the Internet speech business among Fig. 4, promptly is connected user's switched voice information on the Internet with other from the common phone.

NT

Before the network terminal was used to Business Processing, it must be configured with the implicit IP address of IP access server, ip router and telephony server.It also is configured with the user data that is related to user A.By way of example, user data comprises that the IP of user A inserts user's name and password.

When the network terminal was activated, resident IP function just was activated.Particularly, the xSDL that has PPP (point-to-point protocol) link between the network terminal and IP access server connects and to be established.This connection is " always connecting ".On ppp link, the network terminal will self be registered on the IP access server, and the IP access server can be determined to the route of the network terminal now for IP message, and this IP message has the IP address as the network terminal of its destination.Simultaneously, the network terminal is registered at telephony server.

The IP access server

The IP access server has comprised the equipment that is used for the host-host protocol that uses on the termination subscribers feeder, for example xDSL modulator-demodulator.It also comprises the equipment that is used for the link protocol between termination NT and the IP access server.It also comprises the equipment of the link protocol on the link that is used between termination IP access server and the ip router.The IP access server also has routing function except its multiplex/demultiplex function that is provided by the IP agreement, utilize this function, the IP bag that comprises phone information (voice and control signal) according to their home address be directed toward/come between telephony server, the IP bag that comprises Internet information then according to their home address be directed toward/come between ip router.

The IP access server is generally a hundreds of network terminal service.

The IP access server physically is connected with telephony server, and for example by a LAN, this is not expression on figure.These connections are permanent, and promptly they are not based upon one by one on the call basis.On these connected, voice transmitted with the IP agreement.

Ip router

Ip router has comprised that an IP uses, and this is applied as IP and uses the relation of handling between outside ip address or its label of equal value and implicit IP address and the port numbers.

Ip router has an IP application software.

Telephony server

Telephony server comprises that a central controller, a PSTN insert processor, an IP packetization/depacketization unit, an IP processor and an address mapping unit.Under the control that comes from central controller, insert processor and receive to enter and call out and transmission goes out to call out, with the home address of outside PSTN map addresses, and provide and being connected of IP access server to the phone of user A.The speech conversion that contains the IP bag that PSTN access processor will receive from NT is asynchronous voice signal, and they are sent to PSTN, and the voice signal that comes from PSTN then passes through opposite processing.

The network terminal among Fig. 5 is equipped with second telephony interface 34 and an extra terminal device interface 35.The phone 36 that adds is connected with second telephony interface with 37.An extra PC or a LAN (local area network (LAN)) can be connected on this extra terminal device interface.Second telephony interface is endowed an outside PSTN address and a home address.

Described in the explanation of Fig. 4, phone can have several external addresss.An external address can be relevant with several phones.

The terminal device interface that adds is endowed an outside ip address and an implicit IP address.Communicate by letter with IP access server, ip router and telephony server in inner IP address.Outside PSTN address new in telephony server is mapped on the IP address of the network terminal.In the network terminal, new outside PSTN address is mapped on second telephony interface.In ip router, new outside ip address is mapped on the terminal device interface.In the network terminal, new outside ip address is mapped on the terminal device interface.

The network terminal provides the intercommunication between

phone

5,36 and 37.The telephony application that the telephony interface of each NT is moved on the network terminal uses, as shown in Figure 10.Phone application must be known the outside and the home address of first and second telephony interfaces.The phone that is connected on first telephony interface can communicate with being connected second phone on the telephony interface, and vice versa.In this way, the network terminal provides intercommunication.Also have, the phone application that operates on the PC can be communicated by letter with in two phones any one by the network terminal.In preferred embodiments, phone application is designed to: when incoming call, when using the outside PSTN address relevant as the destination address of incoming call with first telephony interface, just send bell signal to phone 5, and use the outside PSTN address relevant and during as the destination address of incoming call with second telephony interface, just send bell signal to

phone

36,37.

Be connected at several network terminals under the situation of same IP access server,, can finish call being connected between the telephone plant of different network terminals through the phone application on the telephony server.In this case, be not based upon connection in the PSTN.

If LAN is connected on the terminal device interface, operating in that IP on the network terminal uses can be with a simple router of the local lan that is connecting distinct device, and each above-mentioned equipment is all supported ICP/IP protocol.Above-mentioned equipment can be kilowatt-hour meter for example, water meter, anti-theft alarm, electronics heat radiator and similar equipment.

If also have a PC to be connected on the terminal device interface 35, this PC can communicate by letter by the network terminal with PC 6.

Network configuration

Ip router shown in Fig. 4 and Fig. 5 is connected to the IP access server with a line.Shown IP access server also is connected on the telephony server by a line.Under actual conditions, every above-mentioned line has been represented a circuit or a network configuration.

IP access server, ip router, telephony server can pass through a lan interconnection.

Among Fig. 6, IP reuse device 38 is connected between IP access node and the network terminal 28 and the

network terminal

39,40 that some are other.The network terminal 39 is similar to the network terminal 28, and is used by another user B.The network terminal 40 also is similar to the network terminal 28, is used by another user D.By with the close network terminal of IP reuse device, use the distance of copper twisted pair cable to be reduced, thereby VDSL can be used as the host-host protocol between the network terminal and the IP reuse device.Between IP reuse device and IP access server, can use optical cable or use several transmission technologys circuit.

The corresponding interface of each extra network terminal and it all with to the mode of the network terminal 28 illustrations given outside and home address.Each IP address is by IP access server, ip router and may also have telephony server to know.Ip router is also carried out the above-mentioned function that outside ip address is mapped to home address.The IP access server generally can be a hundreds of network terminal service.

Among Fig. 5, Access Network comprises the network terminal, IP reuse device and IP access node.At access network user A, between B and the C, can communicate by letter by telephony server, and not need with PSTN or Internet.When user A thought calling party B, he dialed the telephone number of user B.When telephony server received numeral, they were identified in the mapping table of telephony server, and as the destination in the Access Network.This calling just is forwarded to user B, and need not pass through public PSTN network.

IP access server shown in Fig. 6 is connected on the IP reuse device.It also can be connected to the IP reuse device and/or the next network terminal on the illustrated interface that does not add label.

Fig. 7 and Fig. 5 are similar, and difference is that ip router has the part 42 of an other interface 41 and Internet to link to each other, and above-mentioned Internet is by network operator OP2 operation, and it is different from network operator OP1, and OP1 runs another Internet part 43.Telephony server also has other PSTN interface 44, is connected to the part 45 of PSTN, and this part PSTN is by PSTN network operator OP2 operation, and it is different from PSTN network operator OP1, and OP1 is another part 46 of operation PSTN.User A might select to do Internet online and call respectively with any one network operator now.

Explained that above the user has the possibility of selecting to do respectively with any one network operator Internet online and call.This selection can be finished with two kinds of methods.A kind of method is to dispose corresponding ip router and telephony server with the information that service supplier offers user A.When user A dials when crying an outside PSTN address, telephony server is just selected and corresponding that PSTN interface of stored information.When user A begins also to use when surf the Net in an Internet similar process on microcomputer.Second method is when beginning Internet online and call respectively at every turn, all carries out network operator's selection respectively.At this moment user A provides external IP addresses or represents its coding.This coding should synthesize easily, and is for example integrated in dialling the telephone number that cries.For example, user A transfers to the telephone number 123456 of following sequence 123456*1 with the PSTN network portion 46 that is used for calling out network operator's 1 operation, when he wanted to call out the telephone number 234567 of PSTN network portion 45 of network operator's 2 operations, he just transferred to sequence 234567*2.When user A wants to carry out the Internet online on PC, use similar process.

Use the selection that to support Internet network operator OP1 by the exemplary method Internet.Another selects network operator's possibility is to comprise at least a portion selection course in the network terminal of user A.Like this, select just can to automatically perform, can be to network operator's selection based on different parameters, for example which day, the long-distance or short distance calling etc. in the week.

The IP access node is arranged in the access network of a company and is confined near the subscriber exchange PBX47 in Fig. 8.Telephony server has a PBX interface 48 in this case.User A, B, C respectively have the corresponding network terminal in the case.The phone that links to each other with the telephony interface 29 of separately the network terminal has formed the extension set of PBX.Extension has constituted the address space of PBX oneself.The processing of the outside number of PBX is the same with common telephone number.

Calcspar in Fig. 9 has shown that the network terminal provides various functions.Equipment Control function 49 is used for controlling the various functional modules that it shows below.For

telephony interface

29 and 34 two interface function calls 50 and 51 are arranged.Each interface function call provides a common analog interface, and it can detect the control signal of telephone set, as off-hook, on-hook, hooking, dtmf signal.Each telephony interface also produces bell signal and signal tone.In addition, each telephony interface converts analog voice to digital speech, and it is put into the IP bag of output.The IP bag that carries from the PSTN voice messaging of input carries out opposite operation, promptly converts analog voice to from digital speech.

For PC interface 30 and terminal device interface 35 corresponding PC interface function and LAN interface function 54 are arranged also.These two interfaces are all supported the exchange of IP bag.Each interface uses IP and ppp protocol, and will be described below.As describing the last multiple pc machine that is connected with of LAN among Fig. 4.

Modulator-demodulator 55 provides the subscriber line interface function for subscriber line interface 31.Modulator-demodulator uses the digital stream business, as ADSL.

Phone application 52 is also arranged among the figure, also have one or more application to handle 56 in addition, for example an email queries application program.

Addressable unit in the network terminal can communicate by the multiplexing and transmittability of IP, is labeled as IP reuse/demultiplexer 57 among the figure.

With reference to Figure 10.Telephony server 9 comprises a phone application 67.This phone application 67 be used for NT28 in phone application 52 communicate, in two entities, found the relation (calling) between example, that is to say the relation in phone application 52, the 67 processing phone application between telephone number or number of equal value and local address, the port

numbers.Phone application

52,67 is also handled telephone signaling, promptly handles the particular service agreement, as the control protocol of phone.

Figure 10 has been explained in more detail Access Network and how has handled phone application.Basic principle is that intercommunication is finished by IP, comprises from NT28 to the telephony server 9 or rightabout.Correspondingly, system provides an IP territory, here communicates with IP between each unit of face.Perhaps be further noted that whole communication carries out on the last layer of the agreement of modulator-demodulator and link time.

Phone application 67 on telephony server 9 communicates with PSTN2.This preferably adopts the legacy protocol that is used to control signaling 72a and voice transfer 72b.Phone application 67 on telephony server 9 adopts the agreement of internal applications special uses to communicate with the phone application on NT28 52, and it can be V5.2 or else be used for the agreement of phone for example.In this communication, voice are controlled by

speech processes agreement

71,62 and the UDP on telephony server 9, NT28 (User Datagram Protoco (UDP)) 69,60, and wrapping in the IP territory 58 of formation communicated by letter.Parallel with it control signaling is handled by the TCP (transmission control protocol) 68,59 on

control protocol

70,61 and the IP territory 58.

Next the phone application among the NT9 52 communicates with phone 5 that has been connected and their user of use, and the user is just using the analog telephone agreement of phone 63 by simulative telephone interface.Here voice also separate with the control signaling, and voice use UDP64d and coding decoder (CODEC) 65, and the control signaling is used TCP65 and control protocol 66.Also might be carry out communicating by letter between the corresponding interface among phone application 52 and the NT28, but IP58 is considered to the most desirable solution with other mode without IP58.

With reference to Figure 11.Ip router 8 comprises that an IP uses 81.It is to be used for using the relation handled between outside ip address or its coding of equal value and local address, the port numbers for being used for IP that this IP uses.

Figure 11 has explained how Access Network uses 81,79 co-operation with IP.In this example, the external address of IP communication and the map addresses of home address (will further describe below) for example can use that pipe technology solves, and this technology is known in this area.Several known pipe protocol 83,82 and the known process of setting up pipeline between router 8 and PC6 are arranged, therefore will repeat no more.Yet in this case, pipeline is a kind of mechanism, and it utilizes IP as agreement 58, transmits the IP bag between 2 o'clock.Here IP transmits as the data in other IP bag.The address space of two-layer IP is different.In general, lower IP layer 58 is associated with implicit IP address, and higher IP layer 79,81 is associated with outside ip address.When communication ends at NT28, corresponding pipe protocol and available IP (unlisted) are arranged also.When a user wanted by analog telephone access Internet telephony feature, this was perhaps useful.

Possibility

In the superincumbent description, IP is used as a kind of multiplex technique in Access Network.The IP bag also exchanges between IP access server and ip router, also exchanges between IP access server and telephony server.In alternative dispensing means, the IP bag has increased a head according to tag switching protocol.This is operated in ip router, telephony server and the network terminal and finishes.The IP bag can usage flag transmit now.In the IP access server, the mark bag is re-used, and at this moment usage flag is as multiplex technique.The mark bag transmits according to the agreement of tag protocol or special definition.

Application when having described above that the present invention links to each other with PSTN.In other scheme, used ISDN.Application when the present invention links to each other with the Internet equally, has also been described.In possibility, the present invention can be used in an intranet or any one IP-based network.

In a typical case installed, the network terminal was a card, and it is installed in the user family, was located near the wall the subscribers feeder 13.

If ADSL uses as a kind of modem technology, on the about 6 kilometers means of twisted pair copper subscribers feeder of maximum length, can obtain downstream bits stream and the 500Kb/s upstream bits stream of 8Mb/s.If subscribers feeder is shorter, can obtain higher bit rate.If use VDSL can on the copper twisted pairs 13 of ultimate range hundreds of rice, obtain the two-way bit stream of 20Mb/s.Therefore, by IP-based access node 10 being arranged in physically, just can obtain the bandwidth of specified scope apart from the suitable position of the network terminal 15.Be arranged in a kind of remote switch group that locational so IP-based access node 10 can be used as Central Exchange among the PSTN2.

As a modification of phone application, following situation is possible: if phone 5 has a calling, and nobody replys, and then application program can be designed as and be connected to second telephony interface will for the bell signal of this phone.If at this moment calling is replied, telephony application is redirected to this calling in inside second interface so.

In possibility, when the destination of calling was first telephony interface or second telephony interface, phone application can be designed as ring is sent to

phone

5,36,37 simultaneously.

Telephony interface

29 and 34 is to describe as traditional simulative telephone interface here.Certainly, can use much other black phone interfaces.For example, DECT interface (Digital European Cordless Telephone).Can use digital telephone rather than

analog telephone

5,36,37.This digital telephone can also be connected to one with local lan that terminal device interface 35 links to each other on, or be connected on the telephony interface 29,24.Yet they can not resemble carries out cascade the analog telephone.If be connected on the

interface

29,34, then simulative telephone interface must be replaced with traditional digital telephone agreement.

In Fig. 4 and Fig. 5, access node 24 is used as an integral unit and shows.It also can be used as a distributed unit and implements.

Telephony server 9 is 32 services of an IP access server in Fig. 4 and Fig. 5.Also can allow a telephony server 9 be the service of several IP access server.

Ip router is an IP access server 32 service in Fig. 4 and Fig. 5, also can allow the ip router be the service of several IP access server.

In Fig. 4 and Fig. 5, have only an ip router to link to each other, also have many ip routers and be connected to an IP-based network by a go-between with the Internet.

In Fig. 4 and Fig. 5, have only a telephony server to be connected to PSTN.Also have a plurality of telephony servers and be connected to PSTN by go-between.

In Fig. 4 and Fig. 5, have only a telephony server to be connected to an IP access server.Also have a plurality of IP access servers and be connected to telephony server.

The network terminal can have the outside ip address more than, thereby just allows the network terminal oneself to carry out PERCOM peripheral communication with it.

[1] ADSL forum, the brief of copper wire access technology (can obtain) at network address http://www.adsl.com/general_tutorial.html

[2] Swedish patent application 9602212-4, June 4 1966 applying date

[3] Swedish patent application 9604409-4, November 29 1966 applying date

Claims

1. on an access network, the business in the multiple different communication service network is provided a kind of method of access, it is characterized in that using the IP agreement as inside multiplexing and transmission mechanism.

2. according to the method for claim 1, it is characterized in that described multiple communication service network comprises at least a telephone service network.

3. according to the method for claim 2, it is characterized in that described multiple communication service network comprises at least a IP-based network.

4. according to the method for claim 2 or 3, it is characterized in that with the network terminal that access network links to each other in IP is provided protocol processes.

5. according to the method for claim 4, it is characterized in that finishing access to described telephone network by the telephony server that links to each other with an IP access server, the IP access server links to each other with the subscribers feeder of described access network terminal again.

6. according to the method for claim 4 or 5, it is characterized in that the IP access server links to each other with the subscribers feeder of described access network terminal again by finish the access to described IP-based network by the ip router that links to each other with an IP access server.

7. according to the method for claim 5 or 6, it is characterized in that in described telephony server and described ip router being associated of the IP address of external address and access network.

8. according to any one method in the claim 4 to 7, it is characterized in that allowing on the same network terminal, to carry out simultaneously phone and data communication online.

9. according to any one method in the claim 4 to 8, it is characterized in that on the same network terminal, providing access simultaneously to telephone conversation more than one.

10. according to the method for claim 9, it is characterized in that described telephone conversation on the same network terminal uses different telephone service networks.

11., it is characterized in that on the same network terminal, providing for more than inserting in the data communication session according to any one method in the claim 4 to 10.

12. according to the method for claim 11, it is characterized in that described on same network terminal simultaneously data communication session can insert different IP-based network.

13., it is characterized in that having at least an addressable unit that is connected to the network terminal relevant with more than one external address according to any one method in the claim 4 to 12.

14. according to any one method in the claim 4 to 13, relevant on it is characterized in that at least one external address and being connected the same network terminal more than an addressable unit.

15. according to any one method in the claim 4 to 14, the intercommunication phone that it is characterized in that supporting to be connected between the different telephone plants in the same network is called out.

16., it is characterized in that supporting to be connected the internal data communication between the various computing machine equipment in the same network according to any one method in the claim 4 to 15.

17. the method for any one in requiring according to the front all authority is characterized in that user to the same network terminal provides the access to different telephone service networks.

18., it is characterized in that on the basis of each calling, selecting a desirable telephone service network according to the method for claim 17.

19. the method for any one in requiring according to the front all authority is characterized in that user to the same network terminal provides the access to different IP based networks.

20., it is characterized in that on the basis of online each time, selecting a desirable IP-based network according to the method for claim 19.

21. the method for any one in requiring according to the front all authority, the intercommunication phone that it is characterized in that supporting being connected between the different telephone plants of same access node is called out.

22. the method for any one in requiring according to the front all authority is characterized in that supporting being connected to the inside IP session between the various computing machine of same access node.

23. network terminal, it is provided on the Access Network service access to each network of multiple different communication business, it is characterized in that using the device of IP agreement and transmission mechanism multiplexing as inside, the above-mentioned network terminal offers the user side at access network, and described network terminal use IP is multiplexing and transmission mechanism as inside.

24., it is characterized in that it is an xDSL modulator-demodulator according to the network terminal of claim 23.

25., it is characterized in that having at least a interface to terminal unit according to the network terminal of claim 23.

26., it is characterized in that having at least a telephony interface, a phone application and/or other application according to the network terminal of claim 24.

27., it is characterized in that having at least a PC/LAN interface according to the network terminal of claim 24 or 25.

28., it is characterized in that above-mentioned a plurality of communication service network comprises at least one telephone service network according to the network terminal of claim 24 or 25.

29., it is characterized in that above-mentioned a plurality of communication service network comprises at least one IP-based network according to the network terminal of claim 24 or 25.

30. Access Network, comprise many subscribers feeders, at least one network terminal and a network node, each network terminal has (I) subscriber line interface and is used to be connected the interface of telex network facility with at least one, this network node has a telephone network interface, this Access Network is characterised in that described network node comprises with the lower part:

An IP access server,

An ip router, this router links to each other with the IP access server, and has the IP network interface,

A telephony server, this server links to each other with the IP access server, and links to each other with described telephone network interface,

Described a plurality of network terminal links to each other at the tie-in line interface that is provided by the IP access server with described IP access server.

31. Access Network according to claim 30, it is characterized in that providing a high speed modem at the subscriber line interface of each network terminal, and provide the corresponding high speed modem of corresponding quantity at the above-mentioned tie-in line interface of IP access server, each described high speed modem provides from 140KBPS to about 20M BPS and above bit rate, this modulator-demodulator uses a kind of xDSL agreement of selecting from a protocol groups, this protocol groups comprises the DSL agreement, the HDSL agreement, the VDSL agreement, the ADSL agreement, the high-bit-rate digital subscriber line agreement in SDSL agreement and any future.

32. the Access Network according to claim 31 is characterized in that, a high speed modem that provides 140KBPS to arrive about 20M BPS and above bit rate is provided described IP access server.

33. according to the Access Network of claim 31, it is characterized in that having the IP reuse device of several inputs and an output, the described network terminal links to each other with described input by corresponding subscribers feeder, described output links to each other with described IP access server.

34. Access Network according to claim 33, it is characterized in that providing a high speed modem at the subscriber line interface of each network terminal, and provide the corresponding high speed modem of corresponding quantity in the input of IP reuse device, each described high speed modem provides from 140KBPS to about 20M BPS and above high-speed bit speed, this modulator-demodulator uses a kind of xDSL agreement of selecting from one group of protocol groups, this protocol groups comprises the DSL agreement, the HDSL agreement, the VDSL agreement, the ADSL agreement, the high-bit-rate digital subscriber line agreement in SDSL agreement and any future.

35., several IP-based network are arranged wherein according to the Access Network of claim 30, it is characterized in that described ip router has several IP network interfaces, wherein each interface links to each other with one of described several IP network respectively.

36., several switch type telephone networks are arranged wherein according to the Access Network of claim 30, it is characterized in that described telephony server has several telephone network interfaces, each interface links to each other with described telephone service network respectively.

37. network node, when being provided, the business of at least one telephone network provide the subscribers feeder of at least one IP based network business to insert, it is characterized in that having the IP server of a plurality of subscriber line interfaces, an ip router that links to each other with the IP access server, it links to each other respectively with each network in the described IP based network by the IP interface, a telephony server that links to each other with the IP access server, it links to each other respectively with each network in the described telephone network by some telephony interfaces, and described IP access server use IP is multiplexing and transmission mechanism as inside.

38. according to the network node of claim 37, one of telephony interface that it is characterized in that described telephony server links to each other with PBX, described PBX links to each other with one of described telephone network again.

39. telephony server, be used on Access Network, providing access to the telephone network business, it is characterized in that telephony server is connected to an IP access server, this server links to each other with the telephone network terminal point of described Access Network again, and described telephony server comprises the device that uses IP agreement and transmission mechanism multiplexing as inside.

40., it is characterized in that described telephony server is linked into more than in the telephone network according to the telephony server of claim 39.

41., it is characterized in that it has comprised a telephony application according to the telephony server of claim 39.

42. any one the telephony server according to claim 39 to 41 is characterized in that being used for the device that the external call number is relevant with implicit IP address.

43. be used on Access Network, the business of IP based network being provided the ip router of access, it is characterized in that described ip router links to each other with an IP access server, this server links to each other with described Access Network again, and described ip router further comprises the device that uses IP agreement and transmission mechanism multiplexing as inside.

44., it is characterized in that it has the access more than an IP based network according to the ip router of claim 43.

45., it is characterized in that it has the IP that communicates by letter with described IP based network and uses according to the ip router of claim 44.

46., it is characterized in that being used for the device that the external call number is associated with implicit IP address according to the ip router of claim 45.